Grate-bar.



Patented July 6, 1915.

2 SHEETS-SHEET1 INVENTOH.

ATTORNEY.

WITNESSES: fi

COLUMBIA PLANOGRAPH CD-,\VI\SHINGTON, D c.

E. C. CLARK.

GRATE BAR.

APPLICATION FILED ocT.10.. 1912.

1,145,349. Patented July 6, 1915.

2 SHEETS-SHEET 2.

INVENTORZ WITNESSES:

-FJJW'AIRJ) CLARK, F NUTLEY, NEW

GRATE-BAR.

; Application filed October 10, 1912. Serial 1%. 724.907."

To all whom it may concern:

Be it known that I, EDWARD CLA K, a citizen of the United States,residing at Nutley, in the county of Essex and State ofNew Jersey,haveinvented certain Improvements in Grate-Bars, of which the followingis a specification.

This invention relates more particularlyv to that class of grate barswhich are employed in chain grates, such as are found in mechanicalstokers, and the objects of the invention are to provide such a gratebar with improved means for attaching the same to the chains; to"provide such meansv which shall hold the bar rigidly with -re-' spectto the links engaged by the attaching means; to providesucnmeans whichshall detachably connect the grate bar to the chains; to providenew andimproved means for connecting the grate bar to the horizontal links ofthe chains; to provide attaching means which shall partly encircle ahorizontallink; to en'able'said attaching means tobe disengaged by beingbrought opposite a vertical link; to i connect such attachingmeansfirmly and securely to the grate bar; to secure simplicity'ofconstruction and to obtain other advantages and results as may bebrought out'in the following description.

Referring to the accompanying drawings in which like numerals ofreference indicate the same parts throughout several views, Figure 1 isaside elevation of my improved grate bar; Fig. 2 is a planof thesame;Fig.

' 3 is avertical longitudinal section taken on line AA of Fig. 2; Fig.tisan inside; view of one of the side piecesdetached'; Fig. 5 is an endview of the grate bar as seen from the right-hand end of Fig. 1,; Fig. 6an enlarged sectional View of alcertain shoe for supporting saidzend ofthe grate bar upon its chain; Fig." 7' is af' "perspectiveview of I oneof the transverse members removed from the bar; Fig. 8 is a sectionalview online B.B of Fig. 3, lookingin the direction of the arrows, andFig. 9 is asimilar sectional view taken on line C@ of Fig.

In the specific embodiment of the invention illustrated in saiddrawings; the grate bar has a body. portionimade'up of "two longitudinalside pieces 2; 13,1spaced apart from each other, said-bodyportionlremovably supporting uponitself a plurality of transversemembers which constitute in practice thefloor of the fire-box, With moreSpecification of Letters Patent.

Patented July 6,1915.

between. them. The secondside piece 3 above-referred to is likewiseprovided with spacing .ribs 5, 5 preferably parallel to andspacedtransversely from the rib 3, 3 of the first said'bar Q when thesaid-side pieces are assembled. Rivets "or'the like 6, 6 extendingbetween the side pieces 2,-3 clamp the same'rlgldly in the spacedrelation established by the said ribs 41-;55.

It will be noted that the ribs 4,- 5 protect therivets 6 from theheatabove and below and yet allow circulation longitudinally of} thebar.Furthermore,it will-be understood 7 i that by the said ribs 4;5"arranged one on each-of the side pieces 2,53; each side 'piece can beput in a planer and-the endsoredges of its ribs planed down to astandard,"so-

that when the two side piecesare put to-' gether the ribs of each'w'illcontact against the other. v i v At one end ofthe grate'bar ably rivetedbetween the two"side-pieces=-2; 3 i

and prefer i is a depending hook? adapted to engage in' a vertical link8 of "the stoker chain as usually employed. The oppositeend of the baris provided with a' pair of upwardly converging flanges/9, 10 oneyofwhich; as 9, is integral withthe first mentioned side piece 2, as seen'in Fig. 4, whereas'the other flange 10 is integral with the other sidepiece3. A pocket is thereby provided in which is supported by meansofarivet 11' or the like passing transversely through the side-pieces2,-3, a shoe 12,'by means" of which I the grate bar is secured tothe-chaini ora horizontal link 13 thereof. This shoe has'a' pairof'op'positehooked arms 14, 14 depending from the body portion 1 of thegrate bar and adapted to grasp between them-* hooked arms 14', 14are-clamped rigidly to the-linkby a bolt-15 between the two arms tendingto draw them together, so that the j 'selves'thelink' 13 as shownFig.These grate bar may be located in spacedrel'ation" I y to the adjacentgrate bar-s Obv i0usly,when

this bolt 15 is loosened the hooked arms can be slid to one end ofthelho'rizont'al link and then disengaged entirely from the chain Whileopposite the vertical link.

The upper longitudinal portion of each of the side pieces 2, 3preferably flares outwardly upward, as shown in Figs. 8 and 9 forexample, so as to make the body portion of the grate bar wedge-shaped incross-section at its upper part. Each of the transverse members 16comprises a plate-like body having at the middle of its lower edge arecess 17 (see Fig. 7), the sides 18, 18 of said recess convergingdownwardly to conform with the wedge-shape of the body portion 1 justdescribed, whereby a dovetail joint is secured between said body portionand the transverse members 16. Thus the only movement permitted thetransverse members is longitudinally of the grate bar, their insertionand removal being effected at the end of the body portion. Eachtransverse member is at its upper edge preferably leveled from themiddle to its ends, and at its lower edge rounded or curved from therecess 17 to said ends, so as to provide projections or fingers 19 alongthe side of the grate bar. These projections or fingers are spaced bylugs 20 upon the opposite sides of the transverse member, there beingtwo lugs on each side of the member arranged one on the lower inner partof each lateral projection so that the recess 17 is between them. Theselugs are integrally formed with the transverse member and butt againstsimilar lugs on the next adj acent transverse member, when said membersare assembled on the body portion of the grate bar, thereby securingspaces between the lateral projections along the sides of the grate bar.Although it is preferable to make the transverse members of separatepieces of material throughout the middle portion of the grate bar, asshown, yet next adjacent the ends of said bar where the heat from thefire is less intense, the transverse members may be integrallyconstructed in a series or block 21. Longitudinal displacement of thetransverse members from the grate bar, when assembled, is prevented bymeans of end plates 22, 22 or other equivalent means suitably secured tothe ends of the body portion 1.

Obviously the circulation of air which is permitted between the sidepieces 2, 3 is likewise free to pass upward between the transversemembers 16, and such upward circulation is preferably facilitated byhollowing out the transverse members each at the middle of its upperedge, as at 23, 28, so that the air may pass upward therethrough. Thiscirculation of air not only keeps the side pieces 2, 3 and thetransverse members 16 cool, but also affords a better draft for thefire. Furthermore a greater surface for radiation of heat from the gratebar is provided by constructing the same in this manner, all of whichadvantages tend to prevent warping of the bar and secure free action ofthe grate.

It will be noted, also, that should one of the transverse members becomebroken, it is necessary only to remove one of the end plates 22, slideoff the block or series 21 and the members 15 up to the broken one,which may then be replaced by a new member and the others then put backagain.

It will be noted that each transverse member 16 may have a tongue 28depending into the upper part of its recess 17 and adapted to enterbetween the side-pieces 2, 3, when the transverse members are slidthereinto, as clearly shown in the drawing. I do not, however, restrictmyself to the use of this tongue, and there are various othermodifications in detail construction which can be made by those skilledin the art without departing from the spirit and scope of the invention.

ilaving thus described the invention, what 1 claim is:

1. The combination with a grate bar and means at one end thereof adaptedto secure it to a chain, of a shoe at the other end of said grate barhaving arms projecting downward therefromin a plane longitudinal of thegrate bar, said arms having hooked ends directed inwardly toward eachother and adapted to grasp. between themselves a chain lyingtransversely of the grate bar beneath the same, and clamping meansadapted to hold said hooked arms in engagement with such a chain.

2. The combination with a grate bar and means at one end thereof adaptedto secure it to a chain, of a shoe at the opposite end of said grate barhaving arms arranged in alinement with each other longitudinally of thegrate bar, said arms having hooked ends directed inwardly toward eachother and adapted to receive between themselves a horizontally disposedchain link lying transversely of the grate bar beneath the same, andclamping means adapted to hold said hooked arms in engagement with sucha link.

3. The combination with a grate bar hav ing a body portion withlongitudinal sidepieces secured together, of a shoe secured between saidside-pieces at one end of the body portion and having arms projectingdownward therefrom in a plane between said side-pieces and said armshaving hooked ends directed inwardly toward each other and adapted tograsp between themselves a horizontally disposed chain link lyingtransversely of the grate-bar beneath the same, and means adapted tohold said hooked arms in engagement with such a link.

4. The combination with a grate bar hav ing a body portion withside-pieces provided near one end and at their inner faces with upwardlyconverging transverse flanges, of a shoe comprising hooked arms havingtheir upper ends secured to the side-pieces be tween the said flangesthereof and their lower ends projecting below said side-pieces andhaving hooks directed toward each other and adapted to receive a chainbetween themselves. w i

5. The combination with a grate barhaving a body portion withlongitudinal sidepieces secured together, of a shoe secured between saidside-pieces at one end of the body portion and having arms arranged inalinement with each other longitudinally of the grate bar, the lowerends ofsaid arms being spaced from each other and provided with hooksdirected inwardly toward each other and adapted to receive betweenthemselves a chain, and means for adjustably clamping said hookstogether.

6. The combination of a grate bar having a body portion withlongitudinal sidepieces secured together, said side-pieces having attheirinner faces upwardly converging fianges in spaced relationlongitudinally of the grate bar, of a shoe having downwardly divergingarms arranged in the plane of the grate bar and engaging the saidconverging flanges, the lower ends of said arms being spaced apartlongitudinally of the grate bar and having hooks projecting toward eachother and adapted to receive between themselves a chain, and means forfastening the shoe to the grate bar.

7. In an endless chain grate the combination of a chain havinghorizontal and ver-. tical links, a grate bar, and means for detachablyconnecting the grate bar to the chain, said means comprising membersformed to partly encircle and to engage a horizontal link of the chainand to be disengaged from the chain when brought opposite to a verticallink thereof.

8. In an endless chain grate the combination of a chain havinghorizontal and vertical links, a grate bar, a shoe for detachablyconnecting the grate bar to the chain, said shoe having members formedto partly encircle and to engage a horizontal link of the chain and tobe disengaged from the chain when opposite to a vertical link thereof,and means for locating the grate bar in spaced relation to adjacentgrate bars.

9. The combination with a grate bar and, means at one end thereofadapted to secure it to a chain, of a shoe at the other end of saidgrate bar having arms projecting downward therefrom in a planelongitudinal of the grate bar, said arms having hooked ends directedinwardly toward each other and adapted to grasp between themselves achain lying transversely of the grate bar beneath the same.

10. The combination with a grate bar and a grate adapted to means atone'end thereof adapted tofse cure it to a chain,

of a shoe'at the opposite end of said grate bar having arms arranged ina linewith each otherlongitudinal ly of the grate bar,said arms havinghooked ends directed inwardly'toward each other and adapted to receivebetween themselves "a:

horizontally transversely same.

disposed chain link f lying ofthe grate bar beneathp the 11. Thecombination with grate. bar Y adapted to grasp between themselves ahorizontally disposed link of a chain and to disengage from the chainwhen brought op; r

posite a vertical link thereof;

12. The combination with a grate bar and means at one end thereofadapted to secure it to a chain, of a shoe at the other end of saidgrate bar having arms projecting. downward therefrom with hooked endsdiadapted to grasp between themselves a hori,

'90 rected inwardly toward each other and i zontal link of a chain andto disengage from said chain when brought opposite a vertical,

link thereof, and means for locating the grate bbar in spaced relationto adjacent ars. i 1 13. The combination with a grate bar having adownwardly opening rec'essnear one end and means at the other endadapted to secure it to a chain, of a shoe seated at its upper end insaid recess and'having arms projecting downward therefrom with hookedends directed inwardly toward each other and adapted to grasp betweenthem-' selves a chain lying transversely of the grate bar beneath thesame.

14. The combination with "a grate bar having a'downwardly opening-recessnear one end and means at the other; end adapted to secure it to achain, ofa shoe seated at its upper end in said recess and having a armsprojecting downward therefrom with, i

hooked ends directed inwardly toward each other and adapted to graspbetween themselves a chain lying transversely ofthe grate bar beneaththe same, and means for securing said shoein said recess.

15.v The combination with a grate bar having near one end a downwardlyopening recess with one end wall'inclined down' wardlyoutward and meansat the other end of the grate bar adapted to secure it to a chain, of ashoe having its upper end seated insaid recess and beveled at one edgeto engage said incline, said shoe having arms projecting downward withhooked ends directed inwardly toward each other and grasp I betweenthemselves a. chain. i

& 1,145,349

16. The combination with a grate bar having near one end a downwardlyopening recess with one end wall inclined clownwardly outward and meansat the other end of the grate bar adapted to secure it to a chain, of ashoe having its upper end seated in said recess and beveled at one edgeto engage said incline, said shoe having arms projecting downward withhooked ends directed inwardly toward each other and adapted to graspbetween themselves a chain, and means for securing said shoe in saidrecess.

17. In an endless chain grate, the combination of a chain havinghorizontal and vertical links, a grate bar, and means for detachablyconnecting the grate bar to the chain, said means comprising memberswith hooked ends adapted to grasp between themselves a horizontal linkof a chain and providing space between themselves for a vertical link ofthe chain, whereby said means can be detached from the chain whenbrought opposite to a vertical link thereof.

EDWARD C. CLARK. Witnesses:

RUSSELL M. EVERETT, HOWARD P. KING.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

